Re: How much does disk encryption add to boot time?

[David A Lundy <dlundy () PACIFIC EDU>]

David:
     We don't have experience here, but the figures I heard from the
SANS Conference on Disk Encryption last week was typically about a 3%
impact overall.  While it could be more at boot time because that is
disk bound, it didn't seem to be a problem to the organizations
presenting their experiences.

David Lundy

-----Original Message-----
From: Matthew Gracie [mailto:graciem () CANISIUS EDU] 
Sent: Wednesday, May 02, 2007 8:35 AM
To: SECURITY () LISTSERV EDUCAUSE EDU
Subject: Re: [SECURITY] How much does disk encryption add to boot time?

David Millar wrote:
> Does anyone have experience with roughly how much additional time it 
> takes to boot a typical late-model office laptop (or desktop)?  We 
> aren't talking hours here I hope.
>
> Thanks.
>
> Dave Millar
> University Information Security Officer
> University of Pennsylvania

You don't say which OS you're using, but I find that using whole
partition encryption under Linux (with dm-crypt) doesn't add any
overhead time at all, excepting the time to type in the unlock
passphrase.

--Matt

-- 
Matt Gracie                         (716) 888-2403
Information Security Administrator  graciem () canisius edu
Canisius College ITS                425531N / 0785109W
http://www2.canisius.edu/~graciem/graciem_public_key.gpg